Table 1. Characteristics of the patients with rheumatoid arthritis (RA) and healthy controls. Note: ESR: erythrocyte sedimentation rate; CRP: C-reactive protein; DAS28: 28-joint Disease Activity Score; RF: rheumatoid factor; anti-CCP: anti-cyclic citrullinated peptide; NSAIDs: Nonsteroidal anti-inflammatory drugs; DMARDs: Disease-modifying anti-rheumatic drugs; TNF-α inhibitor: tumor necrosis factor alpha inhibitor